<div class="im">2012/10/13 Ramana Kumar &lt;<a href="mailto:ramana@member.fsf.org">ramana@member.fsf.org</a>&gt;<br>
&gt;<br>
&gt; I&#39;m not sure why that error happened but it happened to me too.<br>
<br>
</div>The problem seems to be that those files were not part of any package,<br>
but now are in ghc.<br></blockquote><div><br>Thanks :) So deleting them before upgrading was the right move.<br> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<div class="im"><br>
&gt; I removed the offending files manually and tried again, and ran into more problems (although everything installed, there were many warnings about interface files being the wrong version and being skipped).<br>
&gt; So I&#39;m not sure what the correct way out is. Perhaps it will require some manual removals then reinstalls.<br>
<br>
</div>This is a problem with ghc-pkg version. For previous version of ghc I had to do:<br>
<br>
$ pacman -Rcs ghc<br>
<br>
then reinstall ghc and needed haskell-* packages. I think you&#39;ll want<br>
to remove the offending files before installing ghc again. I hope this<br>
solve the problem.<br></blockquote><div><br>Thanks for the information. I am going to try reinstalling ghc and then all my haskell-* packages, and hopefully it will go through smoothly.<br><br>By the way, what&#39;s the progress on haskell-extra, and did you find out where haskell-old lives (in case haskell-extra still depends on haskell-old)?<br>